At no stage since the incident occurred has there been a fire or explosion at the site. The site remains stable with gas and water continuing to flow to atmosphere through the drill pipe.
A water deluge system has been set up at the drill site as a precaution to minimize the risk of ignition.
An expert team is now being flown in to assist in the control procedures and is expected to be on site on Saturday afternoon.
Following the shut down of the rig on Thursday, Origin is advised that four employees of the drilling contractor received first aid treatment for scalding injuries to their arms.
Origin Energy is operator of License L11 in Perth Basin, Australia.
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